Year Percent 2011-01-01 5.945460000000000 2012-01-01 5.945460000000000 2013-01-01 5.945460000000000 2014-01-01 9.786480000000001 2015-01-01 9.786480000000001 2016-01-01 9.786480000000001 2017-01-01 7.378380000000000